To increase the memory, see MC-12949

good enough for now, just FYI there is a "Attach Files" button at the top of the page

Your PC can't handle the resource pack and has run out of memory. Either increase the memory allowance or use a smaller resource pack

like that?

---- Minecraft Crash Report ----
// Sorry

Time: 1/4/16 5:03 PM
Description: Initializing game

java.lang.OutOfMemoryError: Java heap space
at bmi.a(SourceFile:363)
at bmi.a(SourceFile:263)
at bmh.b(SourceFile:130)
at bmh.a(SourceFile:77)
at bot.j(SourceFile:553)
at bot.a(SourceFile:139)
at bou.a(SourceFile:23)
at bnn.a(SourceFile:99)
at ave.am(SourceFile:448)
at ave.a(SourceFile:310)
at net.minecraft.client.main.Main.main(SourceFile:124)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at bmi.a(SourceFile:363)
at bmi.a(SourceFile:263)
at bmh.b(SourceFile:130)
at bmh.a(SourceFile:77)
at bot.j(SourceFile:553)
at bot.a(SourceFile:139)
at bou.a(SourceFile:23)
at bnn.a(SourceFile:99)
at ave.am(SourceFile:448)

– Initialization –
Details:
Stacktrace:
at ave.a(SourceFile:310)
at net.minecraft.client.main.Main.main(SourceFile:124)

– System Details –
Details:
Minecraft Version: 1.8.9
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 61281184 bytes (58 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.8.9
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics GL version 4.0.0 - Build 10.18.10.4276, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: Inter_Realistic_Modern_Pack_512_V1.8.8.zip
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Pentium(R) CPU N3540 @ 2.16GHz

Top menu of this ticket, there "More" -> "Attach Files"

how do i do that

Please attach the crash report.